:root{color-scheme:light;--ink:#19344b;--muted:#496176;--navy:#10263a;--cream:#f5f8fb;--paper:#fff;--border:#9caebb;--teal:#096d67;--gold:#e5ae4c}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--cream)}
h1,h2,h3{line-height:1.18;letter-spacing:-.025em}h1{font-size:clamp(2rem,4vw,3.45rem);margin:.5rem 0 1rem}h2{font-size:clamp(1.25rem,2.5vw,1.75rem)}h3{font-size:1.25rem;margin:0 0 .8rem}p{max-width:78ch}a{color:#075e76;text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
header{background:var(--navy);color:#f5f8fb;padding:1.2rem max(1rem,calc((100vw - 1280px)/2));display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.6rem}
header a{color:#b9f4e9}header .brand{font-size:1.1rem}main{max-width:1280px;margin:0 auto;padding:1.2rem}footer{margin-top:3rem;padding:1rem 2rem;background:var(--navy);color:#dfe8ed}footer p{margin:auto;text-align:center}
.skip{position:absolute;top:-10rem;left:1rem;padding:.6rem 1rem;background:#fff;color:var(--ink);z-index:4}.skip:focus{top:1rem}
.eyebrow{text-transform:uppercase;font-size:.75rem;font-weight:900;letter-spacing:.12em;color:var(--teal)}
.masthead{padding:1rem 0 1.5rem}.lead{font-size:1.15rem;color:#354b5c}.guardrail{background:#fff4de;color:#543812;border:1px solid #ca973f;padding:.9rem 1rem;border-radius:.5rem;font-size:.93rem;max-width:none}
.layout{display:grid;grid-template-columns:minmax(220px,300px) minmax(0,1fr);gap:1.5rem;align-items:start}
.case-nav,.investigation,.guide{background:var(--paper);border:1px solid var(--border);border-radius:1rem;padding:clamp(1rem,2vw,1.6rem)}
.case-nav{position:sticky;top:.75rem}.case-buttons{display:grid;gap:.7rem}.case-pick{font:inherit;text-align:left;border:1px solid #98b2bd;background:#f1f9fa;padding:.9rem;border-radius:.6rem;color:var(--ink);cursor:pointer}
.case-pick[aria-current=true]{background:#124b54;color:#fff;border-color:#124b54}.case-pick span{display:block;font-size:.8rem;opacity:.85;margin:.1rem 0}.case-pick:focus-visible{outline:3px solid var(--gold)}
.case-head{padding:.5rem 0}.case-head h2{font-size:clamp(1.7rem,3vw,2.25rem);margin:.25rem 0}
.secondary-note{color:var(--muted);font-size:.88rem}.progress{display:flex;gap:.45rem;flex-wrap:wrap;list-style:none;padding:0;border-top:1px solid var(--border);padding-top:1.3rem}
.progress li{border-radius:1rem;background:#e7eef2;padding:.3rem .8rem;font-size:.85rem;color:#334d5d}
.progress li.done{background:#d4efdf;color:#195036;font-weight:800}.progress li.active{border:2px solid var(--teal)}
.stage{padding:1.25rem 0;border-bottom:1px solid var(--border)}.stage h3{margin-top:.6rem}
.choices{display:grid;gap:.6rem}.choices label,.audit label,.study-picks label{display:flex;gap:.7rem;align-items:flex-start;padding:.65rem;background:#f5f8fb;border:1px solid #aec0ca;border-radius:.5rem}
input[type=radio],input[type=checkbox]{min-width:1.1rem;min-height:1.1rem;accent-color:var(--teal);margin-top:.3rem}
button{font:inherit;font-weight:700;cursor:pointer;background:#106e73;border:2px solid #106e73;color:white;border-radius:.5rem;padding:.6rem 1rem;min-height:44px}
button:hover{background:#14535c}button.secondary{color:var(--ink);background:white;border-color:#7c9cab}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.actions{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}
.review-options{grid-template-columns:1fr}.review-options button{text-align:left;background:#264e69;border-color:#52778b}
.feedback{padding:.8rem 1rem;background:#e9f6f7;border-left:4px solid var(--teal);border-radius:.3rem;color:var(--ink);min-height:2rem}.feedback:empty{display:none}
.numeric{font-size:1.3rem;font-weight:800;line-height:1.3;color:#12473d}
.study-picks,.audit{border:1px solid var(--border);border-radius:.65rem;padding:.8rem;margin:.85rem 0}.study-picks legend,.audit legend{font-weight:800}
#studyPicks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem}
.record{padding:.7rem;background:#eff7f1;border-left:4px solid #6a9b70}.comparison{padding:1rem;background:#f0f5f7;border-radius:.6rem;overflow-x:auto}
.comparison svg{width:100%;height:auto;min-width:500px}.comparison figcaption{font-size:.84rem;color:var(--muted)}
textarea{display:block;width:100%;padding:1rem;border:1px solid #7897a4;border-radius:.5rem;font:inherit;resize:vertical;margin:.5rem 0}
.final-actions{display:flex;gap:1rem;flex-wrap:wrap;justify-content:space-between;align-items:center;padding-top:1rem}.guide{margin:1.5rem 0}
[hidden]{display:none!important}@media(max-width:760px){.layout{grid-template-columns:1fr}.case-nav{position:static}#studyPicks{grid-template-columns:1fr}header{padding:1rem}main{padding:.7rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}